Genesis  (1983 - Datasoft)
Platform: Commodore 64
Gametype: Undefined
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An action game set at a time when nascent, insectoid life forms battled each other for survival and for domination of the ecosystem, in an ancient epoch at the dawn of life on Earth (or thereabouts). The player, cast in the role of a scorpion, is tasked with overcoming an incursion by a particularly mean strain of killer spiders.

Similar to Tempest, the player patrols the top edge of a tunnel seen from a bird's-eye view, as enemies rise up from the depths. Firing volleys of venom will destroy the unwelcome arachnids as they try to scale the walls; if they manage to crawl their way to the top, they open holes in the tunnel wall (which spell death for the player). Each wave of attack adds an intermediate platform within the tunnel, which the spiders can move along, change directions and dodge the player's fire.

Also traveling along the top edge is a special color-changing brick: one color means instant death for the player; the other can be picked up, which increases the score multiplier, acts as a shield and allows the player to fix broken sections of the tunnel wall. Good aim is encouraged - extra lives may be gained by keeping a high percentage of hits.

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Description from the packaging:

In the beginning, there were insects, creatures of instinct. Their lives were constantly threatened as they fought to rule the earth. These tremendous battles often disturbed the peaceful serenity of the landscape that was unmarred by the larger forms of life. These battles were fought not only for power, but for survival itself. They were fought in the darkest crevices of the earth's surface where the worst evils dwell.

In Genesis, you're transformed into the deadly king scorpion fighting to protect your domain. The fatally venomous spiders continue crawling from the earth's core as they attempt to destroy you. The spiders gnaw away at the tunnel, as you blast them with your deadly venom. Balanced cautiously on the edge of your domain, you must avoid falling into the deadly pit.
The battle intensifies as the spiders eat away at the walls of the tunnel, and you become more limited in movement. Your only hope is the special brick which allows you to rebuild. Grab it if you can.
Only true speed and accuracy can ensure your survival.


http://www.mobygames.com/game/c64/genesis_
